河南省沿黄稻区的主要裁培制度是稻—麦两熟制。麦茬水稻一般在5月上旬或中旬播种,6月中旬栽插。麦收时节劳动力比较紧张,加上插秧用工较多,常常有一部分水稻要推迟到6月下旬栽插,这部分水稻因秧龄过长,产量较低。如将一部分水稻晚播,即推迟到5月下旬播种,就能够解决秧苗“超龄”问题。1981年和1982年,我们对麦茬水稻晚播问题进行了试验研究,现将其结果整理报告如下: The main system of rice cultivation along the Yellow River in Henan Province is rice-wheat two-cropping system. The stubble rice is generally planted in early May or mid-May and planted in mid-June. Wheat harvest labor more nervous, coupled with more transplanting workers, often part of the rice to postponed to late June planted, this part of the rice because of seedling age is too long, the yield is low. If part of the late sowing of rice, that is postponed to sowing in late May, we can solve the problem of “over-aged” seedlings. In 1981 and 1982, we conducted a pilot study on the late sowing of wheat stubble. We now report the results as follows: